JPS6410754B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refrigerator equipped with a thawing chamber for thawing frozen foods.

Configuration of conventional example and its problems Recently, with the spread of frozen foods, refrigerators with a thawing chamber have become popular. A conventional example of a refrigerator with a defrosting chamber will be described below with reference to the drawings.

FIG. 3 is a sectional view of a conventional refrigerator with a defrosting chamber, and FIG. 4 is an electric circuit diagram thereof.

In the figure, 1 is the main body of a refrigerator with a defrosting chamber.
Reference numeral 2 denotes a partition wall that divides the interior of the main body into upper and lower sections, 3 a freezer compartment partitioned by the partition wall 2, and 4 a refrigerator compartment also partitioned by the partition wall 2.

5 is a cooler arranged inside the partition wall 2. 6 is a cooling fan motor and the cooler 5
The cold air cooled by the cooler is stirred into the freezer compartment 3 and the refrigerator compartment 4. 7 is a compressor for compressing refrigerant. 8 is a thermostat which detects the indoor temperature of the freezer compartment 3 and controls the cooling fan motor 6 and compressor 7.
The temperature inside the freezer compartment 3 is adjusted. In terms of the electrical circuit, the cooling fan motor 6 and the compressor 7 are connected in parallel to a power source via a thermostat 8. 9
is a thawing chamber partitioned within the refrigerator compartment 4, and stores items to be thawed.

Reference numeral 10 denotes a heater disposed within the defrosting chamber 9, which heats the air within the defrosting chamber 9. 11 is the thawing chamber 9
This is a defrosting fan motor located deep inside, which circulates the air inside the defrosting chamber.

A damper thermostat 12 controls the amount of cold air flowing into the refrigerator compartment 4, and adjusts the internal temperature of the refrigerator compartment 4 and the thawing compartment 9 when not defrosting.
Reference numeral 13 denotes a manual timer switch, which sets and controls the defrosting time, that is, the energization time of the heater 10 and the defrosting fan motor 11.

The heater 10 and the defrosting fan motor 11 are electrically connected to the thermostat 8 and the timer switch 13.
It is designed to be connected in parallel to the power supply via.

The operation of the refrigerator with a defrosting chamber configured as above will be explained below.

The cold air cooled by the cooler 5 is blown to the freezing compartment 3, the refrigerator compartment 4, and the thawing compartment 9 by a cooling fan motor 6, thereby cooling each of the compartments.

The indoor temperature of the freezer compartment 3 is controlled by turning on the compressor 7 and cooling fan motor 6 using the thermostat 8.
This is done by -OFF control. That is,
The indoor temperature of the freezer compartment 3 is detected by the thermostat 8, and when the temperature within the freezer compartment rises to a temperature that requires cooling, the compressor 7 and the cooling fan motor 6 are operated, and when the temperature reaches a temperature that does not require cooling, the compressor 7 and the cooling fan motor 6 are operated. The cooling fan motor is stopped.

The indoor temperature of the refrigerator compartment 4 and the thawing compartment 9 is controlled by detecting the internal temperature of the refrigerator compartment 4 using a damper thermostat 12 and controlling the amount of cold air flowing into the refrigerator compartment 4 and the thawing compartment 9.

Upon thawing, the object to be thawed is first stored in the thawing chamber 9. When the defrosting time is set on the timer switch 13 and defrosting is started, the air in the defrosting chamber 9 is heated by the heater 10. The heated air in the thawing chamber is circulated through the thawing chamber 9 by the thawing fan motor 11 and is applied to the object to be thawed, thereby heating and defrosting the object.

The defrosting time, that is, the time for energizing the heater 10 and the defrosting fan motor, is set by the user using a timer switch 13 according to the amount of the object to be defrosted. When the set time comes, the switch inside the timer switch 13 is turned off and the heater 10 is turned off.
Then, the power supply to the thawing fan motor 11 is stopped, thawing is completed, and the object to be thawed is then stored at refrigeration temperature.

However, in the above method, cold air flows into the thawing chamber while the compressor 7 is operating, so the thawing speed differs between when the compressor 7 is operating and when it is not operating, and the set values of the outside air temperature and the freezing room temperature are different. This has the drawback that the thawing state varies due to the difference in the operating rate of the compressor 7 caused by this.

Further, when the compressor 7 is in operation, the amount of cold air flowing into the thawing chamber 9 increases compared to when the compressor 7 is stopped, and the air temperature in the thawing chamber 9 decreases, so that the thawing time is delayed.

In other words, when the operating rate is high and the outside temperature is high, depending on the amount of material to be thawed, there have been cases where the preset thawing time is insufficient for thawing.

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks, the present invention provides a refrigerator with a thawing chamber that can maintain a constant thawing state of an object at the end of thawing, regardless of the operating condition of the compressor.

Composition of the Invention In order to achieve this object, the refrigerator with a defrosting chamber of the present invention is configured such that the calorific value of the defrosting heater is larger during the operating period of the compressor during defrosting than during the period when the compressor is stopped. has been done.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
This will be explained with reference to the figures. Incidentally, the same configurations as those in the prior art are given the same numbers and detailed explanation thereof will be omitted. In the figure, 8 is a thermostat that detects the temperature of the freezing compartment 3, and a cooling fan motor 6,
The compressor 7 is turned ON and OFF to adjust the internal temperature of the freezer compartment 3, and at the same time, during thawing, the thawing heater 1 (described later) is activated when the compressor 7 is in operation and when it is stopped.
Change the amount of heat generated in step 4. Reference numeral 14 denotes a defrosting heater, which is composed of a first heater 14a and a second heater 14b, and is arranged in the defrosting chamber 9. Reference numeral 11 is a defrosting fan motor that circulates the air in the defrosting chamber. The defrosting fan motor 11 and the second heater 14b are electrically connected to the timer switch 1.
3 in parallel to the power supply. The first heater 14a is electrically connected to a power source via a thermostat 8 and a timer switch 13.

The operation of the refrigerator with a defrosting chamber configured as above will be explained below. The operations other than the time of decompression are the same as those of the conventional example, and will therefore be omitted.

At the time of thawing, the object to be thawed is stored in the thawing chamber 9 as in the conventional example, and the thawing is started by setting the thawing time with the timer switch 13 according to the amount of the object to be thawed. When the timer switch 13 is set, the switch inside the timer switch 13 is connected, and the defrosting fan motor 11 and the second heater 14 are connected.
b (for example, 30W). Furthermore, while the compressor 7 is operating during thawing, the switch inside the thermostat 8 is connected, so the first heater 1
4a (for example, 10W) is also supplied with electricity, and the air in the defrosting chamber 9 is heated with a total calorific value of 40W.

During defrosting, when the compressor 7 is stopped, the internal switch of the thermostat 8 is not connected, so the first heater 14a is not energized, and only the second heater 14b is energized, so the defrosting occurs with a heat output of 30W. The air in chamber 9 is heated.

The air in the thawing chamber 9 heated by the first heater 14a and the second heater 14b is circulated in the thawing chamber 9 by the thawing fan motor 11 and is applied to the object to be thawed. Thawing is performed by heating. When the defrosting end time set on the timer switch 13 comes, the timer switch 13
Since the internal switch is disconnected, the defrosting fan motor 11 and heater 14 are no longer energized, and defrosting is completed.

As described above, according to this embodiment, the calorific value of the defrosting heater 14 can be made larger when the compressor 7 is operating than when the compressor 7 is stopped.

Effects of the Invention As is clear from the above explanation, the present invention makes the amount of heat generated by the heater that heats the air in the thawing chamber during thawing larger when the compressor is operating than when the compressor is stopped. Even when a compressor is operated during thawing and a large amount of cold air flows into the thawing chamber, the air temperature in the thawing chamber does not drop and the thawing speed does not slow down.

Therefore, regardless of the operating status of the compressor, the thawing state of the object to be thawed at the end of thawing can be made constant without variation.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram of an embodiment of a refrigerator with a thawing chamber according to the present invention, FIG. 2 is a sectional view of the refrigerator with a thawing chamber shown in FIG. 1, and FIG. 3 is a sectional view of a conventional refrigerator with a thawing chamber. FIG. 4 is an electric circuit diagram of a conventional refrigerator with a defrosting chamber. 7... Compressor, 14... Heater, 14a... First heater, 14b... Second heater.

Claims (1)

[Claims] 1. A refrigeration cycle compressor, and a thawing chamber partitioned into a refrigerator cooled by the refrigeration cycle;
It consists of a heater that heats the air in the thawing chamber and a thawing fan motor that circulates or convects the air in the thawing chamber.During thawing, the heater is constantly energized and the heat generated by the heater is transferred to the compressor while the compressor is running. A refrigerator with a defrosting chamber that is connected to a thermostat so that the compressor is larger than when it is stopped.